Collatz in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 901st dokutan 843 93 428ms 27 Sep 2025 902nd krcs 🇵🇱 842 53 246ms 9 May 2022 902nd ryanlanegit 842 53 243ms 19 Jun 2022 902nd sisyphus-ppcg 🇦🇺 842 53 402ms 15 Aug 2022 905th DialFrost 🇸🇬 842 66 189ms 7 Apr 2025 906th SirBogman 🇺🇸 842 89 46ms 4 May 2022 907th KatieLG 🇬🇧 842 115 290ms 25 Sep 2022 907th emgordon154 842 115 273ms 17 Jan 2025 909th error256 841 81 75ms 13 Sep 2024 910th CLOStrophobic 🇮🇹 841 89 40ms 14 Feb 2025 911th kmathis22 841 100 31ms 25 days ago 912th raszpi 🇭🇺 840 77 98ms 1 Sep 2023 913th eshilo-draper 839 75 86ms 6 Sep 2022 913th kmathis22 839 75 79ms 5 Sep 2025 915th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 916th emplv 🇱🇻 839 124 25ms 31 Oct 2022 917th Codsilla 🇨🇦 838 51 258ms 1 Jul 2022 918th frankgraziano 838 66 4ms 20 Apr 2025 919th Andriamanitra 🇫🇮 838 83 12ms 17 Apr 2023 919th Natanaelel 🇸🇪 838 83 12ms 8 Jul 2023 921st MeWhenI 🇻🇦 838 164 1,639ms 7 Nov 2025 922nd ovs-code 🇩🇪 837 85 15ms 11 Dec 2023 923rd Steffan153 🇫🇮 837 97 29ms 18 Jan 2023 924th CatsAreFluffy 837 101 63ms 18 Feb 2023 924th annaproxy 837 101 51ms 9 May 2023 924th wojtekmal 837 101 55ms 15 Nov 2023 924th HumanoidCPU 837 101 56ms 6 May 2024 924th eMGeeneer 837 101 382ms 27 Jun 2024 924th bac0id 837 101 54ms 29 Jun 2024 924th michaelmoynihan 837 101 380ms 3 Sep 2025 924th snoozingnewt 🇨🇦 837 101 375ms 6 Oct 2025 932nd dokutan 836 88 39ms 9 Jun 2024 933rd SirBogman 🇺🇸 835 36 14ms 5 May 2022 933rd Natanaelel 🇸🇪 835 36 87ms 15 Jun 2022 933rd Steffan153 🇫🇮 835 36 91ms 18 Jan 2023 933rd codereport 🇨🇦 835 36 9ms 1 Jun 2024 933rd GolfinK 835 36 9ms 21 Nov 2024 933rd lifthrasiir 🇰🇷 835 36 10ms 1 Dec 2024 933rd GolfingSuccess 🇬🇷 835 36 11ms 20 Mar 2025 940th scpchicken 🇵🇼 835 55 10ms 4 May 2022 940th SirBogman 🇺🇸 835 55 6ms 5 May 2022 940th Shanethegamer 🇺🇸 835 55 6ms 19 May 2023 940th DialFrost 🇸🇬 835 55 11ms 14 Feb 2025 944th inverseLorentz 🇦🇺 835 69 156ms 3 Jun 2024 944th Yewzir 🇧🇪 835 69 110ms 24 Dec 2024 944th CLOStrophobic 🇮🇹 835 69 170ms 28 May 2025 947th Re-Adventures 🇮🇳 835 116 268ms 16 Jul 2023 947th Yewzir 🇧🇪 835 116 273ms 7 Feb 2024 949th ChiefChippy2 834 56 40ms 4 May 2022 949th aksyristos 834 56 36ms 29 Jan 2023 949th anter69 🇭🇺 834 56 35ms 12 Feb 2024 949th 3dm4n 🇫🇮 834 56 37ms 11 Mar 2024 949th lgrandco 834 56 39ms 9 Oct 2024 949th tatzyr 🇯🇵 834 56 38ms 10 Dec 2024 949th D-MOVE 🇵🇭 834 56 36ms 5 hours ago 956th moustave 834 67 23ms 7 Nov 2024 957th Alex-x90 🇺🇸 834 74 2ms 4 Dec 2022 957th undersquire 834 74 2ms 24 Jun 2023 957th rdmsr 834 74 2ms 24 Jun 2023 957th Bmrl7 834 74 2ms 9 Jul 2023 957th Vinterion 834 74 4ms 6 Nov 2023 957th namelessiw 834 74 2ms 28 Dec 2023 957th Jonatan6 🇩🇰 834 74 2ms 15 Mar 2024 957th Mandrzejy 🇵🇱 834 74 2ms 12 Apr 2024 957th kaurakeksi 🇫🇮 834 74 2ms 29 Dec 2024 966th Shanethegamer 🇺🇸 834 82 141ms 15 May 2023 967th p-vf 🇨🇭 834 93 317ms 24 Jun 2022 967th Smetalo 834 93 315ms 25 Aug 2022 967th malworthy 834 93 329ms 19 Aug 2024 970th Natanaelel 🇸🇪 833 39 131ms 10 Feb 2025 971st Steffan153 🇫🇮 833 55 79ms 21 Dec 2022 972nd Shanethegamer 🇺🇸 833 57 1,051ms 15 Dec 2022 972nd anter69 🇭🇺 833 57 876ms 23 Feb 2023 972nd stefangimmillaro 833 57 891ms 6 May 2023 975th elisherer 🇮🇱 833 64 10ms 5 Jun 2022 First Prev 901–975 of 3,487 Next Last